Relief valve for internal-combustion engines



July 29, 1924. 1,502,753-

L.. SLIGER RELIEF VALVE FOR INTERNAL COMBUSTION ENGINES Filed April 12. 1923 mil-mm Mil-mm IR 1 4 ATTORNEYS,

Patented July .29, 5.924..

n stares LEONARD SLIGER, OF INDIANAFOLIS, INDIANA.

RELIEF VALVE FOE INTERNAL-COMBUSTION ENGINES.

Application filed April 12, 1923. Serial No. 631,648.

To all whom it may concern.

Be it known that I, LEONARD SLIGER, a citizen of the United States, and a resident of Indianapolis, county of Marion, and State of Indiana, have invented a cer tain new and useful Relief Valve for Internal-Combustion Engines; and I do hereby declare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, in which like numerals refer to like parts.

This invention relates to a unitary device that may be incorporated in any internal combustion engine requiring air for its operation.

The chief object of the invention is to construct an air relief valve which, when associated with an engine of the character described, is adapted to furnish an additional supply of air to the engine inde pendently of the amount of fuel supplied thereto, and which will be automatically operable by the engine, and preferably the suction thereof.

Another object of the invention is to provide a simple control forthe aforesaid attachment so that the automatic operation thereof can be readily discontinued when and as desired.

The chief feature of the invention, in addition to the particular details of construction, consists in the provision of a valve having a valve member normally closing an opening, which opening is also closable by another closure, both valve member and closure being operable by the suction of the engine. 7

The full nature of this invention'will be understood from the accompanying drawings and the following description and claims.

In the drawings Fig. 1 is a side elevation of one type of internal combustion engine with the device attached thereto. Fig. 2 is a side elevation of an air relief valve in the relieving position. Fig. 3 is a longitudinal sectional view of the same valve. Fig. 4 is an elevational view of the valve in the next relieving position. Fig. 5 is a transverse sectional view taken on the line 5-5 of 2. Fig. 6 is a transverse sectional view taken on the line 6-6 of Fig. 4 and in the direction of the arrows.

In the drawings one form of internal combustion engine 10 is provided with an air and fuel mixing device or carbureter 11, which discharges into the intake pipe 12in turn discharging into the intake manifold 13 of said engine. The engine is also provided with the exhaust manifold 14 and a suitable cooling system herein indicated by the numeral 15, which represents the water jacket heater.

In Figs. 2 to 6 inclusive, the attachmentshown in Fig. 1 is illustrated in detail. In said Figures 16 indicates a casing or bodyforming chamber and saidbody has both of its ends apertured and threaded. In the lowermost aperture there is positioned a nipple 17 which has a threaded engagement with the intake or intake manifold indicated generally by the numeral 13, or directly with the cylinder. Thus, the chamber 16 is. in free communication with-the intake, and subject to the pull of the engine or vacuum created thereby, otherwise termed the suction.

The other end. ofthe casing 16 is closed by an inlet or mouth-forming member 18 which has a threaded engagement with said threaded open end. The mouth-forming member 18 is apertued at- 19 and inside said aperture 19 there is supported a central bearing or guide 20 which extends outwardly from said inlet member and said guide 20 is supported in position by suitable arms or spiders 21. The inlet member 18, having the mouth 19, is provided with'a plurality of outwardly projecting ears 22 which are preferably in spaced relation with each other. and herein a pair of said ears is illustrated. Each of said cars has a hole 23 therein which constitutes a seat for a pin or spacer 24. Slidably supported upon the guide or hearing 20 is a closure plate 25 which is provided with cars 26 substantially similar to the ears 22 and having holes or recesses 127 therein which are threaded to receive the threaded ends of the pins 24. Thus, as shown clearly in Figs. 2 and 3, when the pins are seated in the holes or recesses 23, the cap or closure 25 will be maintained in spaced relation with respect to the mouth-forming member 18, thereby permitting air to pass between said mouths forming member and said plate and through the opening 19. When, however, the pins are removed from the openings 23 by elevating the plate slightly and turning the same upon the bearing 20', the plate will assume the position shown in Fig. 4 and thus close the opening 19. Suction of the engine will maintain this plate closed.

In addition to the closure hereinbefore described, another closure means is provided and this closure means is a yieldingly sup ported valve member, the tension of which is adjustable. The valve member constitutesa plate or disk 27 centrally apertured at 28 and slidably supported upon a stem 29 positioned in said aperture. The stem 29 has a threaded extension 30engaging the threaded portion 31 of the central guide bearing 20, and said threaded extension b0 terminates in a slotted adjusting head 32. The other end of the stem or guide29 carries a spring retaining plate 33 which is retained thereon by a suitable pin or key member 34. The plate or valve member 27 is suitably grooved at 35 to provide a seat for one, and the larger end of a coil or conical and spirally wound spring 36, the other and the smaller end of which is retained by the spring retaining member 33.

From the foregoing it will be noted that suction of the engine will pull upon the valve member 27, compressing the coil spring 36 and thus permit the air from the atmosphere to passthrough the openings 19 in the inlet or mouth-forming member l8, if the cap or closure 25 is seated as shown in Figs. 2 and 3, or in spaced relation with said mouth-forming member. hen, however, the cap or closure 25 is seated as shown in Fig. 4:, then suction of the engine communicated through the nipple 17 to the chamber of the casing 16 may cause the valve 27 to open or move from its seat, and'such movement will not supply air to the closure for the suction is thereupon transferred to and exerted upon the cap 25, which prevents access ofair to the intake or engine, depending upon the positioning of the attachment.

The construction, as shown herein, is such that the entire valve mechanism may be reinoved without removing the casing or member 16.

The invention claimed is:

1. An air relief valve for an internal combustion engine, including a valve body in communication with the engine intake, and having an opening therein, a valve normally closing said opening and subject to the suction of the engine, and a cap for closing said opening, and seatable by said suction.

2. An air relief valve for an internal coinbustion engine, including a valve body in communication with the engine intake, and having an opening therein, a valve normally closing said opening and subject to the suction of the engine, a cap for closing said opening, and seatable by said suction, and means for maintaining said cap in spaced relation with said opening in opposition to the suction.

3. In a device of the character described in claim 2, the addition of means yieldingly supporting said valve for closing said openmg.

l. An air relief valve for an internal combustion engine, including a valve body in con'iinunication with the engine intake and having an opening therein, a valve normally closing said opening and subject to the suction of the engine, a cap for closing said opening and seatable by said suction, means for maintaining said cap in spaced relation with said opening in opposition to the suc tion, means yieldingly supporting said valve for closing said opening, and adjustable means for adjusting the tension exerted upon said valve.

In witness whereof. I have fixed my signature.

LEONARD SLIGER.

hereunto af- 

